前置A<sub>2</sub>NSBR系统硝化和反硝化除磷的特性

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摘要以处理实际低C/N生活污水的前置A₂NSBR系统为研究对象，考察系统内生物膜的硝化特性和活性污泥的反硝化除磷特性.试验研究了有机物和NO₂^--N浓度对生物膜硝化性能的影响，以及不同电子受体浓度对反硝化吸磷速率的影响.结果测得硝化速率为11.3mgNH₄⁺-N/（L·h），在填充率40%的条件下容积负荷为0.27kgNH₄⁺-N/（m³·d），有机物的存在会对硝化有抑制，但是系统表现出了良好的抗有机负荷冲击能力，硝化速率为9.72mg NH₄⁺-N/（L·h）.NO₂^--N处理对AOB活性几乎无影响，对NOB活性抑制作用明显，当NO₂^--N浓度为400mg/L时，NOB活性仅为1.63%，几乎接近完全被抑制.根据本次不同电子受体条件下除磷批次试验的结果，好氧吸磷速率为17.62mg P/（g VSS·h），以NO₃^--N为电子受体的缺氧吸磷速率是12.94mg P/（g VSS·h），从而可知缺氧聚磷菌占总聚磷菌的比例大约是73.4%，其中在NO₂^--N浓度为30mg/L出现吸磷抑制，当NO₂^--N和NO₃^--N共存时，NO₂^--N在初始浓度为15mg/L便出现吸磷抑制.

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	赵伟华
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	李夕耀
	彭永臻

关键词 ：低碳氮比, 前置A₂NSBR工艺, 硝化, 反硝化除磷, NO₂^--N抑制

Abstract：Biofilm nitrification and activated sludge denitrifying phosphorus removal performance were investigated in the pre-A₂ NSBR system, which treated real low carbon to nitrogen (C/N) ratio domestic sewage. The effect of organic substance and NO₂^--N concentration on the biofilm nitrification performance, and different electronic acceptors on the denitrifying phosphorus uptake rate were studied. Results indicated that nitrification rate was 11.3 mgNH₄⁺-N/(L·h), the ammonia volume loading was 0.27 kgNH₄⁺-N/(m³·d) under the filling rate of 40%, the nitrification performance was inhibited by organic substance, but the system showed a good nitrification rate of 9.72 mg NH₄⁺-N/(L·h) when organics presented. NO₂^--N treatment exhibited little effect on the AOB activity but obvious effect on the NOB activity, the NOB activity was almost completely inhibited (only 1.63%) when NO₂^--N concentration was 400mg/L. According to the phosphorus uptake rate experiment under different electronic acceptors, the phosphorus uptake rate under oxygen and NO₃^--N was 17.62mg P/(g VSS·h) and 12.94mg P/(g VSS·h), respectively, anoxic phosphate accumulating organisms (PAOs) occupied 73.4% of the total PAOs, phosphorus uptake performance was inhibited when the NO₂^--N concentration was 30mg/L, and phosphorus uptake performance was inhibited when the NO₂^--N concentration was 15mg/L under the condition of NO₂^--N and NO₃^--N coexisted.

Key words： low C/N ratio pre-A₂NSBR process nitrification denitrifying phosphorus removal NO₂^--N inhibition

收稿日期: 2019-04-24

PACS:

X703.5

基金资助:国家自然科学基金资助项目（51578014）；北京市教委资助项目

通讯作者: 彭永臻,教授,pyz@bjut.edu.cn E-mail: pyz@bjut.edu.cn

作者简介: 赵伟华(1988-),男,山东潍坊人,助理研究员,博士,主要从事污水处理及资源化技术研究.发表论文14篇.

引用本文:

赵伟华, 李健伟, 王梅香, 黄宇, 冯岩, 李夕耀, 彭永臻. 前置A₂NSBR系统硝化和反硝化除磷的特性[J]. 中国环境科学, 2019, 39(11): 4660-4665. ZHAO Wei-hua, LI Jian-wei, WANG Mei-xiang, HUANG Yu, FENG Yan, LI Xi-yao, PENG Yong-zhen. Nitrification and denitrifying phosphorus removal performance in the pre-A₂ NSBR system. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4660-4665.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I11/4660

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